package com.sky.service.impl;/*
 * ClassName: ReportServiceImpl
 * Package : com.sky.service.impl
 * Description:
 * @Author zKer
 * @Create 2024/4/28 14:06
 */

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service

public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;

    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        // 日期列表
        dateList.add(begin);
        // 将所有日期区间内的日期加入集合
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        // 营业额列表
        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : dateList) {
            // 查询日期区间内的营业额
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("begin", beginTime);
            map.put("end", endTime);
            map.put("status", Orders.COMPLETED);
            // 根据条件查询营业额
            Double turnover = orderMapper.sumByMap(map);
            turnover = turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }

        return TurnoverReportVO
                .builder()
                .dateList(StringUtils.join(dateList, ","))
                .turnoverList(StringUtils.join(turnoverList, ","))
                .build();
    }

    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        // 日期列表
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);

        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        List<Integer> newUserList = new ArrayList<>();
        List<Integer> totalUserList = new ArrayList<>();
        for (LocalDate date : dateList) {
            // 查询日期区间内的用户数量
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map = new HashMap();
            map.put("end", endTime);
            // 查询日期区间内的用户数量
            Integer totalUser = userMapper.countByMap(map);
            // 查询日期区间内的新增用户数量
            map.put("begin", beginTime);
            Integer newUser = userMapper.countByMap(map);


            totalUserList.add(totalUser);
            newUserList.add(newUser);
        }
        return UserReportVO
                .builder()
                .dateList(StringUtils.join(dateList, ","))
                .totalUserList(StringUtils.join(totalUserList, ","))
                .newUserList(StringUtils.join(newUserList, ","))
                .build();
    }

    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        // 订单总数
        List<Integer> orderCountList = new ArrayList<>();
        // 有效订单总数
        List<Integer> validOrderCountList = new ArrayList<>();
        //遍历日期列表，查询订单总数和有效订单总数
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map = new HashMap();
            map.put("begin", beginTime);
            map.put("end", endTime);
            // 查询日期区间内的订单总数
            Integer orderCount = orderMapper.countByMap(map);
            // 查询日期区间内的有效订单总数
            map.put("status", Orders.COMPLETED);
            Integer validOrderCount = orderMapper.countByMap(map);

            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);
        }

        // 计算订单完成率
        Integer totalOrderCount = orderCountList.stream().reduce(0, Integer::sum);
        Integer totalValidOrderCount = validOrderCountList.stream().reduce(0, Integer::sum);

        Double orderCompletionRate = 0.0;
        if (totalOrderCount != 0) {
            orderCompletionRate = totalValidOrderCount.doubleValue() / totalOrderCount;
        }


        return OrderReportVO
                .builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(orderCountList, ","))
                .validOrderCountList(StringUtils.join(validOrderCountList, ","))
                .orderCompletionRate(orderCompletionRate)
                .totalOrderCount(totalOrderCount)
                .validOrderCount(totalValidOrderCount)
                .build();
    }

    @Override
    public SalesTop10ReportVO getTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        // 查询top10的商品
        List<GoodsSalesDTO> goodsSalesDTOS = orderMapper.getSalesTop10(beginTime, endTime);
        String nameList = StringUtils
                .join(goodsSalesDTOS.stream()
                        .map(GoodsSalesDTO::getName)
                        .collect(Collectors.toList()), ",");

        String numberList = StringUtils
                .join(goodsSalesDTOS.stream()
                        .map(GoodsSalesDTO::getNumber)
                        .collect(Collectors.toList()), ",");
        // 封装返回结果
        return SalesTop10ReportVO
                .builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }

    @Override
    public void exportBusinessData(HttpServletResponse response) {
        // 查询最近30天的数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);
        //查询概览数据
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(
                LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));

        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        try {
            // 创建Excel对象
            XSSFWorkbook excel = new XSSFWorkbook(in);
            // 获取表格文件的Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");
            // 填充数据--时间
            sheet.getRow(1).getCell(1).setCellValue("时间：" + dateBegin + "至" + dateEnd);

            // 获得第四行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            // 获得第五行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            // 填充数据--明细
            for (int i=0;i<30;i++){
                LocalDate date = dateBegin.plusDays(i);
                BusinessDataVO businessData = workspaceService.getBusinessData(
                        LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));
                // 获得某一行
                row = sheet.getRow(7+i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());

            }


            // 通过输出流将Excel文件下载到客户端
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
